This ball also features DynamiCore which increases the coefficient of restitution resulting in great continuation and big hitting power

Overall Hook - No Change

but is easy to remove double thickness reduces the number of pieces needed for proper fit

Soft synthetic materials

Radical Closer Select Weight:13 lbs. This ball also features DynamiCoreThe Radical Closer upper mid performance bowling ball offers great continuation with plenty of hook and hitting power. This ball features a symmetric core with DynamiCore and is wrapped with a solid Ai 39 coverstock. Color: Burgundy Black All colors do vary somewhat from the picture shown Core: Symmetric (DynamiCore) Coverstock: Ai39 Solid Finish: 500, 3000 Siaair Micro Pad RG: 2. 540** Differential: 0. 050** ** RG and Diff are based off of 15 lb.